Russian photographer Mikhail Mishainik has made his way 650-feet below the city of Yekaterinburg, Russia, to capture some stunning images of the psychedelic salt mines. As you can from the series, the walls, ceiling and floors are all covered with swirls or red, blue, yellow, green, and gold, all of which have been caused by the mineral carnallite - a source of magnesium which is mainly used as crop fertilisers. So far Mishainik has spent over 20 hours exploring the abandoned mine, including some overnight stays.

"The mines are huge and stretch many kilometres in width and length, a single tunnel can be over four miles long," said Mishainik when speaking to The Daily Mail. "It is hard to describe how it feels being so far down, you lose all track of time and the air is very dry, you always feel thirsty. There is the possibility of a gas leak from chemicals such as methane, hydrogen sulphide carbon dioxide as well the risk of a landslide. The danger element is part of the fun and it's a special feeling being somewhere very few people have seen."